#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
#include<vector>
using namespace std;
int search1(vector<int>& nums, int target)
{
    int left = 0;
    int right = nums.size() - 1;
    while (left < right)
    {
        int mid = left + (right - left) / 2;
        if (nums[mid] > target)
        {
            right = mid - 1;
        }
        else if (nums[mid] < target)
        {
            left = mid + 1;
        }
        else
        {
            left = mid;
            break;
        }
    }
    if (nums[left] == target)
    {
        return left;
    }
    else
    {
        return -1;
    }
}



int search2(vector<int>& nums, int target)
{
    int left = 0;
    int right = nums.size() - 1;
    while (left <= right)
    {
        int mid = left + (right - left) / 2;
        if (nums[mid] > target)
        {
            right = mid - 1;
        }
        else if (nums[mid] < target)
        {
            left = mid + 1;
        }
        else
        {
            return mid;
        }
    }
    return -1;
}

int main()
{
    return 0;
}